Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
NVRO
3776
DELISTED
NEVRO CORP.
NVRO
| $350K | ﹤0.01% |
18,219
+5,748
| +46% | +$123K |
|
|
PETQ
3777
CALL
DELISTED
PetIQ, Inc. Class A Common Stock
PETQ
| $350K | ﹤0.01% |
17,800
-3,300
| -16% | -$59K |
|
3778
PUT
Gold Fields
GFI
$29.2B
| $349K | ﹤0.01% |
32,200
-9,200
| -22% | -$121K |
|
3779
CALL
RXO
RXO
$3.73B
| $349K | ﹤0.01% |
17,700
+1,900
| +12% | +$37.4K |
|
3780
Sprout Social
SPT
$522M
| $349K | ﹤0.01% |
7,004
+5,451
| +351% | +$273K |
|
|
ENLC
3781
PUT
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $349K | ﹤0.01% |
28,600
+5,100
| +22% | +$60.8K |
|
|
AXLA
3782
CALL
DELISTED
Axcella Health Inc. Common Stock
AXLA
| $349K | ﹤0.01% |
+33,500
| New | +$263K |
|
3783
CALL
EPR Properties
EPR
$4.92B
| $348K | ﹤0.01% |
8,400
-16,900
| -67% | -$744K |
|
3784
W&T Offshore
WTI
$473M
| $348K | ﹤0.01% |
79,458
+59,096
| +290% | +$244K |
|
|
AEL
3785
PUT
DELISTED
American Equity Investment Life Holding Company
AEL
| $348K | ﹤0.01% |
6,500
+1,400
| +27% | +$74.9K |
|
3786
Grocery Outlet
GO
$902M
| $347K | ﹤0.01% |
12,036
+8,568
| +247% | +$273K |
|
3787
CALL
Texas Capital Bancshares
TCBI
$4.29B
| $347K | ﹤0.01% |
5,900
+5,100
| +638% | +$309K |
|
3788
Direxion Daily Technology Bear 3x ETF
TECS
$76.7M
| $347K | ﹤0.01% |
215
-356
| -62% | -$511K |
|
|
TBCH
3789
CALL
Turtle Beach Corp
TBCH
$258M
| $347K | ﹤0.01% |
38,300
+28,500
| +291% | +$306K |
|
3790
PUT
Lifestance Health
LFST
$4.29B
| $346K | ﹤0.01% |
50,500
+43,600
| +632% | +$353K |
|
3791
SSR Mining
SSRM
$5.27B
| $346K | ﹤0.01% |
26,057
-33,923
| -57% | -$492K |
|
|
HIMX
3792
Himax Technologies
HIMX
$2.09B
| $345K | ﹤0.01% |
59,219
+29,806
| +101% | +$191K |
|
3793
CALL
NiSource
NI
$21.9B
| $345K | ﹤0.01% |
14,000
+400
| +3% | +$10.8K |
|
|
PPBI
3794
PUT
DELISTED
Pacific Premier Bancorp
PPBI
| $345K | ﹤0.01% |
+15,900
| New | +$366K |
|
3795
CALL
Q2 Holdings
QTWO
$3.71B
| $345K | ﹤0.01% |
10,700
+4,400
| +70% | +$146K |
|
3796
PUT
RCI Hospitality Holdings
RICK
$203M
| $345K | ﹤0.01% |
5,700
-3,300
| -37% | -$221K |
|
3797
CALL
Trinity Capital Inc.
TRIN
$1.59B
| $345K | ﹤0.01% |
24,800
+12,000
| +94% | +$174K |
|
3798
Dentsply Sirona
XRAY
$2.7B
| $345K | ﹤0.01% |
+10,107
| New | +$384K |
|
3799
EXL Service
EXLS
$4.66B
| $344K | ﹤0.01% |
+12,300
| New | +$360K |
|
|
AY
3800
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
| $344K | ﹤0.01% |
18,054
-36,592
| -67% | -$828K |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.